Rockwell Automation 1756-LSC8XIB8I ControlLogix Low-speed Counter Module - Manual (Page 70)

70 Rockwell Automation Publication 1756-UM536A-EN-P - April 2012
Appendix B Tag Definitions
Configuration Tags The configuration tags in Table 5 on page 71 define the module’s configuration.
IMPORTANT The Counter[x].CountDown output tag is active only if the Up/Down Count
function is not tied to Counter[x] via a hardware input. If a hardware input is
tied to Counter[x], the hardware input overrides the value of the
Counter[x].CountDown output tag.
IMPORTANT Either the Count Enable hardware input or the corresponding bit in the
Counter[x]DisableCount output tag can determine whether counting is
enabled or disabled.
Counting is enabled under the following conditions:
• Counter[x].CountEnTieToPt configuration tag = -1 (no tie) or 0…7 and the
corresponding hardware input is non-inverted and high or inverted and
low (level-sensitive)
and
• Counter[x]DisableCount output tag = 0 (level-sensitive)
Counting is disabled under these conditions:
• Counter[x].CountEnTieToPt configuration tag = 0…7 and the
corresponding hardware input is non-inverted and low or inverted and
high (level-sensitive)
or
• Counter[x]DisableCount output tag = 1 (level-sensitive)
IMPORTANT Either the Reset Count hardware input or the corresponding bit in the
Counter[x]ResetCount output tag can determine whether the count is reset.
Counting is reset to zero under the following conditions:
• Counter[x].ResetTieToPt configuration tag = 0…7 (rising edge-sensitive)
or
• Counter[x]ResetCount output tag = 1 (rising edge-sensitive)
IMPORTANT Either the Preset Count hardware input or the corresponding bit in the
Counter[x]PresetCount output tag can determine whether the count is preset.
The count is preset to the Counter[x].Preset value under the following
conditions:
• Counter[x].PresetTieToPt configuration tag = 0…7 (rising edge-sensitive)
or
• Counter[x]PresetCount output tag = 1 (rising edge-sensitive)